Yahoo, ICQ , GTalk and ... Protocols?

Hi,


For my project I have to access the Yahoo!, ICQ, GTalk and other messaging services protocols.





Can u help me?





note1: My project is developing a Mozilla Firefox 3.0extension that providing access through many interfaces. for example Yahoo, icq, GTalk and ...





note2: Mozilla Firefox extensions written with XUL(For its interfaces) and javascript for actions.
Yahoo, ICQ , GTalk and ... Protocols?
What kind fo help do you require for your project assignment?
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